CHEMICAL REACTION ENGINEERING QUIZ

Watery soft rot is found mostly in

cereals

vegetables

all of these

fruits

TRUE ANSWER : ?
YOUR ANSWER : ?

Concentrate of fruits and vegetable juices

favor the growth of A. niger and A. flavus species

None of these

favor the growth of Saprophytic bacteria

favour the growth of yeast and of acid and sugar tolerant Leuconostoc and Lactobacillus species

TRUE ANSWER : ?
YOUR ANSWER : ?

Bacterial soft rot is caused due to

formation of amino acids

fermentation of pectin

formation of ketones

fermentation of sugars

TRUE ANSWER : ?
YOUR ANSWER : ?

Anthracnose is a defect which can be observed as

all of these

spotting of seedpods

spotting of fruits

spotting of leaves

TRUE ANSWER : ?
YOUR ANSWER : ?

Black mold rot is caused by

A.flavus

Trichothecium roseum

Trichoderma

A. niger

TRUE ANSWER : ?
YOUR ANSWER : ?

Under what conditions food poisoning bacteria may grow and produce toxins in vegetables?

When thawed vegetables are held at refrigerated temperature for any considerable period

When thawed vegetables are held below refrigerated temperature for any considerable period

None of these

When thawed vegetables are held at room temperature for any considerable period

TRUE ANSWER : ?
YOUR ANSWER : ?

Yeast are most likely to grow in frozen fruits during

none of these

refrigeration

ambient temperature

slow thawing

TRUE ANSWER : ?
YOUR ANSWER : ?

Species of __________ are predominant on thawing vegetables like sweet corn and peas when the temperature of thawing is fairly low.

Streptococcus

none of these

Micrococcus

both (a) and (b)

TRUE ANSWER : ?
YOUR ANSWER : ?

The micro-organism which is present in both fresh and frozen juices is

None of these

P. chrysogenum

E. coli

Entereobacter aerogenes

TRUE ANSWER : ?
YOUR ANSWER : ?

The predominant micro-organisms in frozen foods are

yeast and moulds

micro-coccus

bacteria

none of these

TRUE ANSWER : ?
YOUR ANSWER : ?